src/mesa/drivers/dri/i965/gen6_gs_visitor.h

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef GEN6_GS_VISITOR_H
  26 #define GEN6_GS_VISITOR_H
  27
  28 #include "brw_vec4.h"
  29 #include "brw_vec4_gs_visitor.h"
  30
  31 #ifdef __cplusplus
  32
  33 namespace brw {
  34
  35 class gen6_gs_visitor : public vec4_gs_visitor
  36 {
  37 public:
  38    gen6_gs_visitor(const struct brw_compiler *comp,
  39                    struct brw_gs_compile *c,
  40                    struct gl_shader_program *prog,
  41                    void *mem_ctx,
  42                    bool no_spills,
  43                    int shader_time_index) :
  44       vec4_gs_visitor(comp, c, prog, mem_ctx, no_spills, shader_time_index) {}
  45
  46 protected:
  47    virtual void assign_binding_table_offsets();
  48    virtual void emit_prolog();
  49    virtual void emit_thread_end();
  50    virtual void visit(ir_emit_vertex *);
  51    virtual void visit(ir_end_primitive *);
  52    virtual void emit_urb_write_header(int mrf);
  53    virtual void emit_urb_write_opcode(bool complete,
  54                                       int base_mrf,
  55                                       int last_mrf,
  56                                       int urb_offset);
  57    virtual void setup_payload();
  58
  59 private:
  60    void xfb_write();
  61    void xfb_program(unsigned vertex, unsigned num_verts);
  62    void xfb_setup();
  63    int get_vertex_output_offset_for_varying(int vertex, int varying);
  64
  65    src_reg vertex_output;
  66    src_reg vertex_output_offset;
  67    src_reg temp;
  68    src_reg first_vertex;
  69    src_reg prim_count;
  70    src_reg primitive_id;
  71
  72    /* Transform Feedback members */
  73    src_reg sol_prim_written;
  74    src_reg svbi;
  75    src_reg max_svbi;
  76    src_reg destination_indices;
  77 };
  78
  79 } /* namespace brw */
  80
  81 #endif /* __cplusplus */
  82
  83 #endif /* GEN6_GS_VISITOR_H */